Resource exhaustion in Spring Security
CVE-2026-40988
An application using spring-security-saml2-service-provider and the REDIRECT binding for SAML 2.0 Login or Logout may be vulnerable to a denial of service by way of an unbounded writer that inflates the compressed SAML payload into memory…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.003 (25.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Spring Security — versions 5.7.0, 5.8.0, 6.3.0
- Vmware Spring_security
Weakness classification (CWE)
References
- security@vmware.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-40988?
- CVE-2026-40988 is a high-severity vulnerability in Spring Security, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-10.
- How severe is CVE-2026-40988?
- High severity. CVSS v3 base score is 7.5 out of 10.